Hearts of Iron IV

Hearts of Iron IV

12,470 ratings
Hearts of Iron IV: The Great War
File Size
369.431 MB
Jun 8, 2016 @ 4:27am
Oct 4 @ 1:26am
48 Change Notes ( view )

Subscribe to download
Hearts of Iron IV: The Great War



Status: Open Beta
Project Lead: Wolferos
Current Version: 0.7.6b
Compatible with: Hearts of Iron IV "Hydra"
Supported Languages:
- English
- French (Integrated in the Mod, Version Améliorée)
- Russian (Integrated in the Mod, Спасибо https://www.strategium.ru)
- Japanese (日本語化MOD, +JP: The Great War | +JP: The Great War NEW)
- Polish (Polskie Tłumaczenie)
- Turkish (Türkçe Yama[paradoxfan.com])
- Chinese (Chinese Translation)
- German (warning, experimental stage)
- Korean (Korean Translation | Mirror[hearts-of-iron-4.smods.ru])
- Portuguese (warning, experimental stage)
- Spanish (warning, experimental stage)


One hundred years ago, a war in Europe erupted which would change the world as we know it. Men were forced out of their homes, from their farms and apartments, to fight in seemingly neverending trenches, gaining meters and meters of ground a day at the cost of massive casualties.

Hearts of Iron IV: The Great War, an overhaul mod for Hearts of Iron IV, puts you in the position of one of the countries of the world in World War One's time period. In an era where the stakes were high and risks even higher, you'll have to tread lightly when it comes to diplomacy. A single mistake or a single bluff gone too far could mean the deaths of millions.

Of course, that's not to say that the Great War is the only thing on anyone's minds. Revolution is flaring up in China and Mexico, Italy is rumored to have designs on taking Libya, and the Balkan States seem to be banding closer against one of their foreign targets. With all this conflict across the world, the Great Powers alone won't be having all of the fun.

The War itself has been modeled to match more closely the flow and style of war of World War I. Infantry virtually alone will rule the Battlefield at the beginning of the Conflict, before Planes and Armored Cars will take the field in good numbers. Trench Systems will see construction throughout Europe, until a mad engineer's dream, the Tank, rolls out of the factory and onto the Battlefield. All the while, massive fleets of massive Dreadnoughts will fill the Oceans, with all sides vying to wrest control of the waters.

With elaborate National Focus trees that delve deep into Alternate History, you may find two games with the same country end up completely differently. What if French Socialists began a great civil war during the mutinies? What if Italy decided to go hardline and fight with the Central Powers? In this Mod, the smallest divergences can change everything.

The Great War Mod, of course, is designed to attempt to emulate how Paradox themselves would have designed the scenario, so veterans of the World War II scenario and of the Hearts of Iron franchise will have no trouble adjusting. Even the new models, sounds, and animations are designed with Paradox's standards in mind. You may just settle into the game so quickly, you'll wind up with trench foot and shell shock before you realize it.


Two Starting Scenarios
  • 1910: The Powderkeg of Europe. Guide your nation through events like the Balkan Wars and Agadir Crisis as the road to war begins to be laid out.
  • 1914: The Great War. Jump straight into the action of the historical First World War. Can you avoid the mistakes of history, or will you find yourself falling into even worse traps?

New National Focus Trees for
  • German Empire
  • Austria-Hungary
  • France
  • United Kingdom
  • Russian Empire
  • Italy
  • Ottoman Empire
  • USA
  • Japan
  • Soviet Russia
  • Serbia
  • Bulgaria
  • Mexico
  • Netherlands
  • Belgium

New and unique weapons of warfare:
  • Brand New Doctrines designed for the era
  • Technologies simulating Gas Warfare
  • Armored Car, Airship, Light Machine Gun, Trench Mortar and Flamethrower
  • The New "Trench" building
  • More than 500 Technologies

Real events from the time period
  • The Assassination of Archduke Franz Ferdinand
  • Alternative Scenarios
  • The Xinhai Revolution
  • The Mexican Revolution
  • The October Revolution
  • Tons of Historic News Events for added flavor
  • Regional Events for all Major Powers

News 3D Models for
  • Infantry
  • Tanks
  • Planes
  • Armored Cars
  • Zeppelins


  • More Treaty events to replace the Peace Conferences
  • Interwar Period Events
  • More National Focus Trees
  • Improved GFX and 3D Models
  • More Technologies and Flavor Texts
  • More Country Leaders, Political Advisors, Generals, Admirals
  • Game Balancing and Improved AI Decisions
  • More than that to come...


Q: Is this Mod Ironman Friendly?
A: We've modified way too many files for this to ever be Ironman Friendly. If we had the sort of magic to make it so, we'd be in Stockholm right now.

Q: Is this Mod playable in Multiplayer?
A: Yes! It's a great way to spend a saturday night, just make sure you boys don't let carried away and let that stretch to monday morning.

Q: Any recommended country?
A: The German Empire, the Austro-Hungarian Empire and the French Republic are always a good choice to start but you are free to try any country that you want.

Q: This Mod seems cool! Can I help you?
A: Yes, you can help us, we have a GitHub Repository[github.com] for that.

Q: Will this Mod include Interwar Period and World War II?
A: We have already starting to work slowly on the Interwar Period and we have included some Vanilla National Focus for WW2.

Q: Where can I download the Mod?
A: We strongly recomand to use the Steam Workshop Version but you can download it on Mod DB or on NexusMods[www.nexusmods.com].

  • Dizzle
  • Kaiser Anony
  • DevilIris
  • MasterWaifuman
  • skullbe
  • Kuebelwagen
  • Stluvik
  • MurderMountain
  • M3Henry
  • fedcba
  • MrBlazzar
  • Citofis
  • Jadasong
  • Zkuhh
  • Vale
  • Crouching Lemur
  • Tsunami
  • Zak MacKay
  • Seonake
  • Benoît (Mundus Bellicus)
  • Darksaber501st
  • lahvan
  • Mixmaximonster
  • tihhoni
  • Felicianum2
  • Polemarque
  • AlainEtCo
  • Kraftbruehe
  • Xabi273
  • Mindeufair
  • EnderVod
  • Tigerass
  • Shkiv
  • BaCe21
  • Felixiinho
  • NicolasGrosjean
  • Honeymaple
  • habbala
  • SandwichPhil
  • Comrader
  • Veydem

Flickering Flags Fix made by Chairman Meow
Austro-Hungarians Voices made by Geodomus


Show us your Support! Don't forget to like us on Facebook[www.facebook.com], follow us on Twitter and Subscribe to our YouTube Channel.
Popular Discussions View All (625)
Oct 12 @ 4:27pm
PINNED: Bugs Reports 0.7.6 ~ 0.7.6a ~ 0.7.6b
Oct 6 @ 2:19pm
Not Compatible with Hydra 1.7
Oct 3 @ 12:37pm
The Schlieffen plan?
< >
RomanLegionnaire 3 hours ago 
Will the focus trees ever be changed more?
Memesarenotdead 7 hours ago 
and check political distions when this happens
Memesarenotdead 7 hours ago 
send your troops to the yellow lines
The God Particle 18 hours ago 
im really confused, and almost always have been at the mechanic of states in rebellion for the ottomans like albania, can someone explain how that is supposed to work? am i getting a bug? all that happens is the region gets yellow lines over it and thats it
cluetasticjr2 19 hours ago 
verdun should be a city
Roman Eagle Oct 15 @ 2:05pm 
there is a problem with the A.I nation, they use the basic (vanailla HOI4) tech tree. why is this appening
Accius Oct 15 @ 9:54am 
Are there any good companions mods the rest of the community uses to make this mod even more fun? I’ve only been using the No Division Limit mod (very necessary imo). Am particularly interested in any AI mods. In my games the USA tends to enter the war very late or not at all, meaning that I invariably always win as Central Powers. But endgame stats show USA turns into an absolute monster so any fix for this would be great.
TheSammyOwl Oct 14 @ 7:59pm 
as austria hungary the central powers puppetedt the enitre balkans, then they freed themselves multiple times joined the entente and flooded us.
Admiral Odin Oct 14 @ 6:41pm 
Due to my respect for Wolfheroes work. I want to invite you all to a discord regarding this mod. With the intention of great fun and building a healthy MP community within the mod. https://discord.gg/G2aG45S
SmokeTheAsianKush Oct 14 @ 1:54pm